He tightened his jaw and kept that thought from showing on his face.

It was a wild guess, but from the way he tightened his jaw, I knew I'd hit home.

He tightened his long jaw and peered down at me.

She tightened her jaw, and felt very nearly murderous at that moment.

Frustration filled Adam's voice, tightened his jaw, and he pushed back from the table.

She tightened her jaw, and raised her chin a little.

You can't just tighten your jaw and go charging up there.

The chief engineer, though, merely tightened her jaw and accepted the drink.

Tom tightened his jaw but nodded for Chakotay to continue.

Worry tightened his jaw as he reached out and touched her cheek.